The presentation "Laser-assisted synthesis of multielement nanoparticles" will be introduced by Rafael Torres-Mendieta, Ondřej Havelka from Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Czech Republic.
The 26st NARECOM will take place on Wednesday, May 24, 2023, at 2:30. p.m.
Join Zoom Meeting: https://cesnet.zoom.us/j/91217172671
Abstract:
Driven by the advanced tools provided by nanotechnology, humanity is changing its approach to current and future obstacles. Nanomaterials of all kinds, including those with multiple elements that synergistically solve increasingly complex issues, are massively produced within this new vision. However, to prevent the paradoxical scenario of drowning in waste from the nanomaterials intended to assist us, minimizing the waste associated with their creation, usage, and disposal is mandatory. In response to this need, our team at the Technical University of Liberec is devoted to developing three laser-mediated synthesis pathways that can produce high-quality multielement nanomaterials while avoiding creating chemical waste. These methods include laser synthesis of colloids, laser surface modification of materials, and laser-mediated photoreduction of metal salts in solution. These techniques involve irradiating precursor elements such as solids in bulk and structured or even molecular compounds. The targets can be irradiated in controlled environments like liquid or gaseous mediums, and the out-of-equilibrium conditions promoted by the laser-matter interactions enable us to produce various complex nanostructures. The most outstanding results derived from exploring these techniques, and that will be discussed in the meeting, encompass the creation of Fe ultra-small nanoparticles with multiple crystalline coexisting families for use as nanofillers in smart fluids,1 the heterojunction of photosensitive semiconductors to fabricate robust photocatalysts,2 the alloying of immiscible elements to generate non-conventional nanoalloys,3 and the superficial modification of polymeric membranes to improve their capacity to recover pure water from oily polluted sources.4
References:
[1] Cvek, M., et al. (2020). Laser-induced fragmentation of carbonyl iron as a clean method to enhance magnetorheological effect. Journal of Cleaner Production, 254, 120182.
[2] Torres-Mendieta, R. O., et al. (2020). Toward Expanding the Optical Response of Ag2CrO4 and Bi2O3 by Their Laser-Mediated Heterojunction. The Journal of Physical Chemistry C, 124(48), 26404-26414.
[3] Torres-Mendieta, R., et al. (2019). Laser-assisted synthesis of Fe-Cu oxide nanocrystals. Applied Surface Science, 469, 1007-1015.
[4] Ettel, D., et al. (2021). Laser-synthesized Ag/TiO nanoparticles to integrate catalytic pollutant degradation and antifouling enhancement in nanofibrous membranes for oil–water separation. Applied Surface Science, 564, 150471.
Acknowledgement:
The authors acknowledge the assistance provided by the Research Infrastructure NanoEnviCz, supported by the Ministry of Education, Youth and Sports of the Czech Republic under Project No. LM2023066.
